DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD431008
1M-BIT CMOS FAST STATIC RAM
128K-WORD BY 8-BIT
Description
The
µ
PD431008 is a high speed, low power, 1 048 576 bits (131 072 words by 8 bits) CMOS static RAM.
The
µ
PD431008 is packed in 32-pin plastic SOJ.
Feature
q
q
q
q
q
q
q
131 072 words by 8 bits organization
Fast access time 15, 17, 20 ns (MAX.)
Output buffers control: OE
Common I/O using three state outputs
Fully static operation: no clock or refreshing to operate
TTL compatible: all inputs and outputs
Single +5 V power supply
Ordering Information
Operating
supply current
mA (MAX.)
160
150
140
10
Standard
Standby
supply current
mA (MAX.)
Quality grade
Access time
Part number
Package
ns (MAX.)
15
32-pin plastic
SOJ (400 mil)
20
17
µ
PD431008LE-15
µ
PD431008LE-17
µ
PD431008LE-20
Remark
Operating supply current is 120 mA (MAX.) when this product is used at 50ns cycle time.
Please refer to "Quality grade on NEC Semiconductor Devices" (Document number IEI-1209) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
The information in this document is subject to change without notice.
Document No. IC-3242
(O.D.No.
IC-8815)
Date Published July 1993 P
Printed in Japan
©
1993
1992
µ
PD431008
Pin Configuration (Marking Side)
32-Pin Plastic SOJ (400 mil)
A3
A2
A1
A0
CS
I/O1
I/O2
V
CC
GND
I/O3
I/O4
WE
A16
A15
A14
A13
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
A4
A5
A6
A7
OE
I/O8
I/O7
GND
V
CC
I/O6
I/O5
A8
A9
A10
A11
A12
µ
PD431008LE-15
µ
PD431008LE-17
µ
PD431008LE-20
A0 – A16
CS
WE
OE
V
CC
GND
:
:
:
:
:
:
Address Inputs
Data Inputs/Outputs
Chip Select
Write Enable
Output Enable
Power Supply
Ground
I/O1 – I/O8 :
2
µ
PD431008
Block Diagram
A7
1
Address
buffer
8
9
Row
decoder
Memory cell array
1 048 576 bits
(512× 256
×
8)
A9
A16
I/O1
I/O8
Input data
controller
Sense/Switch
Output data
controller
Column decoder
8
Address buffer
7
A0 - A6
1
A8
CS
WE
OE
V
CC
GND
Truth Table
CS
H
L
L
L
OE
!
L
!
H
WE
!
H
L
H
Mode
Not selected
Read
Write
Output disable
I/O
Hi-Z
D
OUT
D
IN
Hi-Z
I
CC
Supply current
I
SB
Remark
!
: Don't care
3
µ
PD431008
Electrical Specifications
Absolute Maximum Ratings
Parameter
Supply voltage
Input/Output voltage
Operating temperature
Storage temperature
Note
Symbol
V
CC
V
T
T
opt
T
stg
Rating
– 0.5
Note
to +7.0
– 0.5
Note
to V
CC
+0.5
0 to +70
– 55 to +125
Unit
V
V
°C
°C
–3.0 V (MIN.) (Pulse width: 10 ns)
Recommended Operating Conditions
Parameter
Supply voltage
High level input voltage
Low level input voltage
Ambient temperature
Note
Symbol
V
CC
V
IH
V
IL
T
a
MIN.
4.5
2.2
– 0.5
Note
0
TYP.
5.0
MAX.
5.5
V
CC
+0.5
+0.8
+70
Unit
V
V
V
°C
–3.0 V (MIN.) (Pulse width: 10 ns)
DC Characteristics (Recommended operating conditions unless otherwise noted)
Parameter
Input leakage current
Output leakage current
Symbol
I
LI
I
LO
Test conditions
V
IN
= 0 V to V
CC
V
I/O
= 0 V to V
CC
, CS = V
IH
or OE = V
IH
or
WE = V
IL
Cycle time: 15 ns
Operating supply current
I
CC
CS = V
IL
,
I
I/O
= 0 mA
Cycle time: 17 ns
Cycle time: 20 ns
Cycle time: 50 ns
I
SB
Standby supply current
I
SB1
V
OH
V
OL
CS = V
IH
, V
IN
= V
IH
or V
IL
V
CC
– 0.2 V
<
CS,
=
<
0.2 V or V
CC
– 0.2 V
<
V
IN
V
IN
=
=
I
OH
= –4.0 mA
I
OL
= 8 mA
2.4
0.4
MIN.
–2
–2
TYP.
MAX.
+2
+2
160
150
mA
140
120
30
10
mA
Unit
µ
A
µ
A
High level output voltage
Low level output voltage
Remark
V
IN
: Input voltage
V
V
Capacitance (T
a
= +25
°C,
f = 1 MHz)
Parameter
Input capacitance
Input/Output capacitance
Remark 1.
V
IN
: Input voltage
2.
These parameters are periodically sampled and not 100 % tested.
Symbol
C
IN
C
I/O
V
IN
= 0 V
V
I/O
= 0 V
Test conditions
MIN.
TYP.
MAX.
6
8
Unit
pF
pF
4
µ
PD431008
AC Characteristics (Recommended operating conditions unless otherwise noted)
AC Test Conditions
Input waveform (Rise/fall time < 3 ns)
=
3.0 V
1.5 V
GND
Test points
1.5 V
Output waveform
1.5 V
Test points
1.5 V
Output load
AC Characteristics directed with the note should be measured with the output load shown in
Fig. 1
or
Fig. 2.
Fig. 1
(For t
AA
, t
ACS
, t
OE
, t
OH
)
+5 V
Fig. 2
(For t
CHZ
, t
CLZ
, t
OHZ
, t
OLZ
, t
WHZ
, t
OW
)
+5 V
480
Ω
480
Ω
I/O (Output)
I/O (Output)
255
Ω
30 pF
C
L
255
Ω
5 pF
C
L
Remark
C
L
includes capacitances of the probe and jig, and stray capacitances.
5
